Fix isNewIdentifierLocation after async (#46485)

src/services/completions.ts

@@ -2209,8 +2209,9 @@ namespace ts.Completions {
         function isNewIdentifierDefinitionLocation(): boolean {
             if (contextToken) {
                 const containingNodeKind = contextToken.parent.kind;
+                const tokenKind = keywordForNode(contextToken);
                 // Previous token may have been a keyword that was converted to an identifier.
-                switch (keywordForNode(contextToken)) {
+                switch (tokenKind) {
                     case SyntaxKind.CommaToken:
                         return containingNodeKind === SyntaxKind.CallExpression               // func( a, |
                             || containingNodeKind === SyntaxKind.Constructor                  // constructor( a, |   /* public, protected, private keywords are allowed here, so show completion */
@@ -2254,10 +2255,13 @@ namespace ts.Completions {
                     case SyntaxKind.TemplateMiddle:
                         return containingNodeKind === SyntaxKind.TemplateSpan;                // `aa ${10} dd ${|
 
-                    case SyntaxKind.PublicKeyword:
-                    case SyntaxKind.PrivateKeyword:
-                    case SyntaxKind.ProtectedKeyword:
-                        return containingNodeKind === SyntaxKind.PropertyDeclaration;         // class A{ public |
+                    case SyntaxKind.AsyncKeyword:
+                        return containingNodeKind === SyntaxKind.MethodDeclaration            // const obj = { async c|()
+                            || containingNodeKind === SyntaxKind.ShorthandPropertyAssignment; // const obj = { async c|
+                }
+
+                if (isClassMemberCompletionKeyword(tokenKind)) {
+                    return true;
                 }
             }
 

tests/cases/fourslash/completionsAsyncMethodDeclaration.ts

@@ -0,0 +1,25 @@
+/// <reference path="fourslash.ts" />
+
+//// const obj = {
+////   a() {},
+////   async b/*1*/
+//// };
+//// const obj2 = {
+////   async /*2*/
+//// };
+//// class Foo {
+////   async b/*3*/
+//// }
+//// class Foo2 {
+////   async /*4*/
+//// }
+//// class Bar {
+////   static async b/*5*/
+//// }
+
+test.markerNames().forEach(marker => {
+  verify.completions({
+    marker,
+    isNewIdentifierLocation: true
+  });
+});